You can see a list of available commands onscreen at any time by saying “Hey Cortana, what can I say?” If there’s no microphone icon in the upper-right corner of the screen, your Xbox is not listening. You’ll need to get its attention by repeating “Hey Cortana” before issuing your command.

Voice commands are not available in all regions. For a list of Xbox One features and the regions where they’re available, see Xbox One Feature Availability.